Rename TEXT_BASE into CONFIG_SYS_TEXT_BASE

The change is currently needed to be able to remove the board
configuration scripting from the top level Makefile and replace it by
a simple, table driven script.

Moving this configuration setting into the "CONFIG_*" name space is
also desirable because it is needed if we ever should move forward to
a Kconfig driven configuration system.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/arch/sparc/cpu/leon2/start.S b/arch/sparc/cpu/leon2/start.S
index b1f1eb5..dd58262 100644
--- a/arch/sparc/cpu/leon2/start.S
+++ b/arch/sparc/cpu/leon2/start.S
@@ -455,7 +455,7 @@
 	WRITE_PAUSE
 	mov	%l7, %o0		! irq level
 	set	handler_irq, %o1
-	set	(CONFIG_SYS_RELOC_MONITOR_BASE-TEXT_BASE), %o2
+	set	(CONFIG_SYS_RELOC_MONITOR_BASE-CONFIG_SYS_TEXT_BASE), %o2
 	add	%o1, %o2, %o1
 	call	%o1
 	add	%sp, SF_REGS_SZ, %o1	! pt_regs ptr